docs: def _get_default_cache_file_path(self):
          """
          Returns default cache file path
  
          :return: default cache file path (to data directory)
          :rtype: str
          """
  
          default_list_path = os.path.join(
              self._get_default_cache_dir(), self._CACHE_FILE_NAME)
  
          if not os.access(default_list_path, os.F_OK):
              raise CacheFileError(
                  "Default cache file does not exist "
                  "'{}'!".format(default_list_path)
              )
  
          return default_list_path